How often will you be updating your info?
By the time I go through all the websites and write the reviews, I could probably start all over and come up with enough new information to update the reviews again. Most of the websites are new, and changing daily. So, to answer your question, as often as possible!
I've debated whether I should update the reviews if there's a significant change, or if it's better to update them on a regular schedule. I've also considered starting a blog, and posting any exciting updates in the wild world of movie and tv forums. And it does get pretty wild at times . . .
I've been kind of distracted the past couple of weeks with some maintenance issues on my website, but it's all better now, and I'm ready to focus on the content again. I've been tossing around a number of different ideas, and I'm always open to suggestions.